It is worth expanding that the card issuing function of WeChat applet is not limited to receiving coupons, but also includes issuing membership cards, loyalty cards and so on. The design of these card issuing functions aims to enhance the shopping experience and loyalty of users, and at the same time, it also provides merchants with more marketing means and the possibility of data analysis. By issuing WeChat applet, merchants can better interact with users, provide personalized services, and monitor users' consumption behaviors and preferences in real time, so as to carry out accurate marketing and sales strategies. Therefore, the card issuing function of WeChat applet has been widely used in e-commerce, retail and other industries.